Fix invalid return from some more `_get/_set` #14532

Job	Run time
📊 Static checks / Code style, file formatting, and docs	40s
🤖 Android / Template (target=template_release)	4m 39s
🍏 iOS / Template (target=template_release)	2m 26s
🌐 Web / Template (target=template_release)	1m 41s
🐧 Linux / Editor w/ Mono (target=editor)	5m 48s
🐧 Linux / Editor with doubles and GCC sanitizers (target=editor, tests=yes, dev_build=yes, scu_build=yes, precision=double, use_asan=yes, use_ubsan=yes, linker=gold)	25m 53s
🏁 Windows / Editor (target=editor, tests=yes)	12m 27s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	8m 19s
🍎 macOS / Editor (target=editor, tests=yes)	6m 51s
🏁 Windows / Template (target=template_release)	9m 5s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	12m 17s
🍎 macOS / Template (target=template_release)	4m 21s
🐧 Linux / Template w/ Mono (target=template_release)	2m 30s
🐧 Linux / Minimal template (target=template_release, everything disabled)	54s
🪲 Godot CPP / Build and test Godot CPP	10m 2s
	1h 47m 53s

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